(1) I loaded some 165 sierras hpbt (2140) with 9.4gr trail boss average vel. was 1020 fps (fun to shoot). At 10 yards every round (20 total) was nice little holes no keyholeing.. at 50 yards every round (5 total )keyholed.. Question: would you use these through "your" suppressor since they are stable a 10 yards. the keyholeing is ok, because they are sill accurate @ 50 yards just not perfect little holes. I have about 300 bullets and would like to use them up...
(2) Now looking for a better subsonic bullet to keep to form keyholeing. like a round nose flat base type, or what every you all recomend.
Have any of you got a 1-12 twist, and shoot subsonic? if so what type of bullet do you like and what grain? using a 1-12 twist.

I wish i had a 1-10 or faster but i dont.. so my new suppressor should be here in a month or two, just trying to work out some loads while waiting.

I have been researching and reading for weeks now, would really like to hear form First hand experence with subsonic 308 using 1-12 twist, and results - good or bad.

Similar problem. I bought some .22 sub sonic loads 900 something FPS. These still had a lot of energy since it was a 60gr bullet. These key holed at 10ft. I am now thinking of trying it in an AR with a conversion kit since the twist in an AR is designed for bullets around this weight.

__________________
I have mostly non-sporting firearms
In NJ, technically speaking, ALL guns are illegal
Also in my state there is such thing as a Class III BB gun :barf:
Happy to say that despite the NJ AWB I still manage to make my guns look scary

As to the conversion.. been down that road.. I have a 22 suppressor also
I purchased a cmmg unit for my mp-15 I think it is a 1-9 twist. Anyway my rifle loved the 60 gr ammo. No keyholeing @ 25 yards. Since the thread is 1/28 on my AR " with the cmmg kit installed" put the suppressor on. I have shot about 200 rounds with it and no issues and very fun and cheap to shoot.. I have had good luck with the cmmg conversion ..

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